Quasielastic neutron scattering investigation of the pressure dependence of molecular motions in liquid water (Articolo in rivista)

Type
Label
  • Quasielastic neutron scattering investigation of the pressure dependence of molecular motions in liquid water (Articolo in rivista) (literal)
Anno
  • 2006-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1063/1.2174007 (literal)
Alternative label
  • A. Cunsolo; A. Orecchini; C. Petrillo; F. Sacchetti (2006)
    Quasielastic neutron scattering investigation of the pressure dependence of molecular motions in liquid water
    in The Journal of chemical physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • A. Cunsolo; A. Orecchini; C. Petrillo; F. Sacchetti (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 124 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • OGG, F-38042 Grenoble 9, France; CNR, INFM, Ctr Ric & Sviluppo, SOFT, I-00185 Rome, Italy; Univ Perugia, Dipartimento Fis, I-06123 Perugia, Italy (literal)
Titolo
  • Quasielastic neutron scattering investigation of the pressure dependence of molecular motions in liquid water (literal)
Abstract
  • We report on a high-resolution, high-statistics, quasielastic neutron scattering (QENS) experiment on liquid water, aimed at accurately measuring the pressure dependence of the single-particle dynamic response function at low wave vector transfers, namely, from 0.26 to 1.32 A(-1). High-pressure QENS data were collected along the T=268 K isothermal path over the rather extended pressure range of 80 up to 350 MPa, a thermodynamic region so far unexplored by this microscopic technique. The analysis of the measured line shapes enabled us to draw a consistent picture of the wave vector and pressure dependences of the diffusion mechanisms in liquid water, against which the most recent models for water dynamics can be checked. In close similarity with the case of supercooled water, the relaxing-cage model was found to provide a quantitatively more accurate description of the molecular motions and their pressure evolution in liquid water. (literal)
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